Ideal Gas Law
Write the equation for the ideal gas law.
PV = nRT
What units should be used for the density of gases?
g/L
What statement of equality describes standard molar volume?
22.4 L = 1 mol
Give Graham's Law of Effusion.
rate1/rate2 = square root of M2/square root of M1
Convert 56C to Kelvin.
329 K
Find the mass of 5.6 L of O2 at 1.75 atm and 250. K.
15.3 g
How many moles are contained in 5.60 L Cl2 at STP?
0.250 mol Cl2
Which gas effuses faster: fluorine or chlorine?
Fluorine
Calculate the volume (in L) occupied by 0.200 mol H2 at 300.K and 1.25 atm.
39.4 L
Find the molar mass of 0.650 g occupying 1.12 L at 280. K and 1.14 atm.
11.7 g/mol
What is the volume (in L) of 0.0400 mol CO2 at STP?
0.896 L CO2
What is the ratio of the average velocity of hydrogen molecules to that of neon atoms at the same temperature and pressure?
3.16
Determine the number of moles of gas contained in 0.80 L at 27C and 0.925 atm.
0.030 mol
If the density of an unknown gas is 3.20 g/L at -18C and 2.17 atm, what is the molar mass of this gas?
30.9 g/mol
A container holds 265 mL of chlorine gas (Cl2). Assuming the gas sample is at STP, what is its mass?
0.839 g
At a certain temperature and pressure, chlorine molecules have an average velocity of 0.0380 m/s. What is the average velocity of sulfur dioxide molecules under the same conditions?
0.0400m/s
Calculate the pressure (in mmHg) exerted by 7.50 x 102 mL of NO2 containing 2.15 mol at 57C.
59,100 mmHg
One method of estimating the temperature of the center of the sun is based on the assumption that the center consists of gases that have an average molar mass of 2.00 g/mol. If the density of the center of the sun is 1.40 g/cm3 at a pressure of 1.30 x 109 atm, calculate the temperature in degrees Celsius.
2.26 x 107C
The principal source of sulfur on Earth is deposits of free sulfur occurring mainly in volcanically active regions. The sulfur was initially formed by the reaction between the two volcanic vapors SO2 and H2S to form H2O(l) and S8(s). What volume of each gas, at 0.961 atm and 22C, was needed to form a sulfur deposit of 4.50 x 105 kg on the slopes of a volcano in Hawaii.
1.18 x 108 L SO2
2.35 x 108L H2S
A sample of helium effuses through a porous container 6.50 times faster than does unknown gas X. What is the molar mass of the unknown gas?
169 g/mol